129007517 has 2 divisors, whose sum is σ = 129007518. Its totient is φ = 129007516.

The previous prime is 129007471. The next prime is 129007519. The reversal of 129007517 is 715700921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98823481 + 30184036 = 9941^2 + 5494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129007517 is a prime.

Together with 129007519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129007519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64503758 + 64503759.

It is an arithmetic number, because the mean of its divisors is an integer number (64503759).

Almost surely, 2^129007517 is an apocalyptic number.

It is an amenable number.

129007517 is a deficient number, since it is larger than the sum of its proper divisors (1).

129007517 is an equidigital number, since it uses as much as digits as its factorization.

129007517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 129007517 is about 11358.1476042531. The cubic root of 129007517 is about 505.2872489242.

The spelling of 129007517 in words is "one hundred twenty-nine million, seven thousand, five hundred seventeen".